Pump.



-.|. M. KELLEY.

v l PUMP.

APPLlCATION FILED MAR. i6. 1914.

1 1 70,756. Patented Feb. 8, 1916. A

" TED sTa'rEs PATENT GFFICE JHN M. KELLE'VY, 0F ROCHESTER, NEW YORK.

PUMP.

To all ywhom z't may concer/n.' A

Be it known that I, JOHN M. KELLEY, of Rochester, in the county ofMonroe and `State of New York, have vinvented a new and usefulImprovement in Pumps, which tion of the pump sothat none of the liquidcan enter the pump chamber, while, at the same time, the valve betweenthe pump chamber and the liquid container is prevented from freezing orsticking to its seat.

To these and other ends, the invention consists in certain parts andcombinations of parts all of which will rbe hereinafter described, thenovel features being pointed out in the appended claims,

In the drawings: Figure 1 is a vertical section through a sprayerembodying the present improvements; Fig. 2 is an enlarged verticalsection through the lower end of the pump; and Fig. 3 isa horizontalsection on the line af-a, Fig. 2.

:in fire extinguishers of the type employing carbon tetrachlorid as theextinguishing liquid, great difficulty has heretofore been experiencedin keeping the liquid from the pump' chamber ,when a portion'of thelatter has been immersed in the liquid, and it has been found that whena cupshaped leather piston is employed in such a sprayer, theeffectiveness of such piston is immediately destroyed upon contact withthe carbon tetrachlorid. It has also been found that even thoughnon-corrosive metal be employed in the valve of the pump, such valvewill stick or freeze to its seat under the action of carbontetrachlorid. l

The above disadvantages are overcome by the construction herein setforth in which- 1 indicates the container of any suitable constructionpreferably having a manually vcontrollable discharge nozzle 2 andprovided with a re extinguishing orv other liquid 3. The top wall of thecontainer may be provided with a central opening formed by a sleeve 4which is internally threaded to receive an externally threaded cap 5 onthe Specmcation of Letters Patent.

forms the pump chamber, the cap being provided with openings 7 to permitthe intake of air within the pump chamber above ther piston to bedescribed. l

The lower end of the cylinder 6 may be closed by a head 8 which may beprovided wlth a central discharge opening 9 and the latter may be closedby a valve 10 preferably 1n the form of a plunger having a .coneshapedupper end 11 for seating against the lower end of the discharge passage9. The tapered portion of this valve may operate within the chamber 12formed at the lower end of the discharge passage 9 and having suitable ctlets 13 communicating with the interior of the container 1. The lowerWall of this chamber 12 may be in the form of a bushingl which closesthe chamber and guides the plunger 10. A coiled spring 15 may abut theshoulders formed by the tapered vupper end of the valvey and the uppersurface of the bushing and tends normally to cause the valve to close.

Patented Feb. 8, 191.6. -Application nieu mich 1e, 1914. semi No.825,080.

Within the pump chamber, a pump piston -1 gagement with the centralportion of the cup piston, thenut and washers operating 'on a reducedscrew threaded portion of the piston rod 21 and the screw threadedportion being projected beyond the nut so that it may be made t0 extendat 22 into the discharge passage 9 in order to engage with the upper end11 of the valve 10 so as to displace the valve from its seat. rlhisengagement between the extension 22 on the pump pistonand the valvecannot occ-ur during the normal operations of the pump piston but onlyafter the extension has been rotated in order to engage with the screwthreaded wall 23 of the discharge opening.

Prior to the disengagement of the valve lfrom its seat by the extension22, the latter has, by its. engagement with the screw threaded portion.23, formed' an effective valve or closure forthe discharge opening 9,so that, when the'valve 11 is displaced from its seat, liquid cannotlflow from the container 1 into the pump chamber by way of the discharge9.

Another feature which adds to the life of the pum is the meansforironing or pressing out t e operative ange of the pump lpisupwardannular-extension 25 on the head 8,

the upper part of said annular pocket being wider than the lower part inorder that the flange of the piston, even though sllghtly distorted orwrinkled, may enter the pocket,

the turning of the piston and the advancement thereof by the screwthread serving to press or iron out the flange until finally the lattei"is received within the restricted portion of the annular pocket 24.

From the foregoing, it will be seen that there has been provided asprayer in which the valve between the pump and the container can beheld away from its seat when the device is inoperative, While yeteffectively closing the communication between the cylinder and the pumpchamber to prevent the entrance of the liquid Within the pump chamber.Furthermore, the pump is provided with means which permits the pressingor spreading of the cupped pump piston and thus insures that the pumpwill be ready for action even though the same has not been used forconsiderable time. The screwing down of the pump piston rod holds thesame in a fixed position so that the piston cannot Work outward to itspossible detriment. For instance, When the sprayer is carried in anautomobile, motor boat, or other vehicle, if the handle Were not sofixed, the rod could or might become bent or, if carried loosely withother things such as tools, etc., the handle might becomecaught orentangled, thus delaying the necessary quick application of the fluid tothe fire.

l/Vhat I claim as my invention and desire to secure by Letters Patentis:

1. A pump comprising a cylinder having an outlet, a piston, and a valvecontrolling said outlet, the piston carrying a projection rigidtherewith and movable into engagement with the valve to open thecommunication.

2. A pump comprising a cylinder having an outlet, a. piston and a vvalvecontrolling said outlet, the piston carrying a portion I arranged toopen the valve and to close the outlet when the piston is moved to openthe valve.

3. A pump comprising a cylinder having an outlet, a piston and a valvecontrolling said outlet, the piston carrying a portion arranged to openthe valve and to close the outlet, said portion being in the form of aprojection arranged to enter and close said outlet prior to the openingof the valve.

4. A pump comprising a cylinder having an outlet, a piston, and a valvecontrolling Said outlet, the piston carrying a portion arranged to openthe valve and to close the outlet, said portion being inthe forni of aprojection arranged to enter and close said outlet prior to the openingof the valve, and the walls of the outlet having interlocking screwthreads so that the projection is advanced toward o-r removed from thevalve as said projection is rotated. l

5. A pump comprising a cylinder having a head formed with a dischargepassage, a spring pressed valve arranged to close said passage, acup-shaped leather' piston operating in said cylinder, a piston rodcarrying said piston and projecting beyond the latter to enter thedischarge passage to close the latter and then to open the valve.

6. A pump comprising a cylinder having an internal annular pocket at oneend, a cupshaped piston operable in said cylinder, and a screw portioncarried by the piston and adapted to cause the flange of the piston toenter the pocket.

7. A pump comprising a cylinder having an internal annular pocket at oneend and a screw threaded portion, a cup-shaped piston operable in saidcylinder, and a piston rod connected to the piston and having a screwthreaded portion adapted to cooperate with the screw threaded 'portionon the cylinder to cause the flange of the piston to enter the annularchamber to be pressed out by the latter.

JOHN M. KELLEY. Witnesses: i

HAROLD H. SIMMS, ADA M. lVHrrMoRE.

